Ory
Open-source identity, authentication, and authorization from Germany. Self-host the full stack or use Ory Network – no vendor lock-in.
Quick facts
The entire identity and authentication stack – login, permissions, MFA – is open source and self-hostable, so you're never locked into a vendor's proprietary auth system.
Self-hosting the full stack takes real DevOps effort, and the managed Ory Network service costs more as usage scales.
Why does it score 87?
Incorporated in Munich, Germany – a full EU member state.
Venture-backed by investors including Insight Partners, but no single non-EU company holds a controlling stake.
Ory runs its own infrastructure in Germany, and the entire stack can be self-hosted so you're never locked into their cloud.
Fully open source and GDPR-compliant – one of the most widely used open-source identity stacks, with a large community reviewing the code.
See how they compare
Ory
Okta 
Auth0 More European Authentication & identity alternatives
Open-source identity infrastructure from Switzerland with built-in multi-tenancy and passwordless login. Self-host it or run it on Swiss-hosted cloud.